Apr 14, 2023 · Rise time has different definitions: Generally, it's the time taken by the output to reach 1. But it can be defined as from 10% to 90% for overdamped, and 5% to 95% for critically damped. To calculate rise time, calculate the time-delta for the required conditions by solving for t for c(t)'s limit values.

Mar 8, 2022 · Sometimes some manufacturers cheat a bit and say the rise time from 20% to 80% to make the time smaller, but when converted to 10% to 90% it is not so great. Some things are defined from 30% to 70%. For RC and 1st order stuff it takes 1 tau to charge from 0 to 63% and much longer to charge from 10% to 90% with same tau. \$\endgroup\$

Apr 28, 2023 · I am just trying to understand why we use 2.2·τ when calculate the rise time. I can't find a derivation anywhere, I don't understand where this 2.2 comes from.

Apr 2, 2022 · People say rise time is what matters, not the frequency. So regardless of my signal frequency, I have to worry about rise time? It's really foggy for me because people seem to talk about 1/3, 1/4, 1/5 wavelength trace lengths as limit for terminating resistors, some people say 1/10 of the electric length...

Sep 20, 2016 · BW is bandwidth in GHz, and TR is rise-time in nanoseconds. This formula uses the 10/90 rise time. So if your rise time is 10 ns, then your BW is 0.35/10 = 0.035 GHz = 35 MHz. Another way to look at it is that you want the round trip flight time of your signal to be substantially less than your rise time.

Nov 30, 2024 · I found this LRC network and have been stuck trying to figure out how it satisfies the desired characteristics for impedance/rise time. A and B are the ±5V output from an HC4052 which require a rise time of 1.5±0.5us. The output impedance of …

Jul 24, 2018 · "The rise time of a signal is the time difference between the crossing of the lower threshold and the crossing of the upper threshold for a positive- going edge. The X cursor shows the edge being measured." My confusion is that I never set thresholds. The measurement can be done automatically by just choosing "rise time".

Oct 30, 2021 · The rise time would be something like 3 to 5 time constants depending on where you want to draw the line. \$\endgroup\$ – DKNguyen Commented Oct 30, 2021 at 5:57

Aug 17, 2020 · The figure shows a modification, from state A to state B, carried out on the cell at the output of circuit (X). In both cases, the voltage at point A is the same. The transistors M1 and M2 keep the same dimensions. How to define or calculate the rise time of the signal at point A? How to explain or how to define the decrease in current through M2?

Jan 4, 2023 · The circuit shown will ramp towards +5V or -5V with a variable rate depending on the DAC output. I relaxed the 1ns rise time to 10ns otherwise there would likely be zero chance of finding an op amp that could meet the timing requirements. The capacitors should be NP0 type for high stability and good frequency characteristics.